/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.jtfadmin.activiti.controller.model;

import cn.jtfadmin.base.lang.common.utils.RequestUtils;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ActivitiException;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.io.*;

/**
 * 工作流-在线设计器访问 保存模型
 * @author Tijs Rademakers
 */
@RestController
public class ModelSaveRestResource implements ModelDataJsonConstants {

  protected static final Logger LOGGER = LoggerFactory.getLogger(ModelSaveRestResource.class);

  @Autowired
  private RepositoryService repositoryService;

  @Autowired
  private ObjectMapper objectMapper;

  /**
   * 工作流-在线设计器访问 保存模型
   * @param modelId 模型id
   */
  @RequestMapping(value="/model/{modelId}/save", method = RequestMethod.PUT)
  @ResponseStatus(value = HttpStatus.OK)
  public void saveModel(@PathVariable String modelId) {

      HttpServletRequest request = RequestUtils.getRequest();
      Model model = repositoryService.getModel(modelId);
    ObjectNode modelJson = null;
    try {
      modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());
    } catch (JsonProcessingException e) {
      throw new RuntimeException(e);
    }

    modelJson.put(MODEL_NAME, request.getParameter("name"));
      modelJson.put(MODEL_DESCRIPTION, request.getParameter("description"));
      model.setMetaInfo(modelJson.toString());
      model.setName(request.getParameter("name"));
      repositoryService.saveModel(model);
    try (InputStream svgStream = new ByteArrayInputStream(request.getParameter("svg_xml").getBytes("utf-8"));
         ByteArrayOutputStream outStream = new ByteArrayOutputStream();){
      repositoryService.addModelEditorSource(model.getId(), request.getParameter("json_xml").getBytes("utf-8"));
      TranscoderInput input = new TranscoderInput(svgStream);
      PNGTranscoder transcoder = new PNGTranscoder();
      // Setup output
      TranscoderOutput output = new TranscoderOutput(outStream);
      // Do the transformation
      transcoder.transcode(input, output);
      final byte[] result = outStream.toByteArray();
      repositoryService.addModelEditorSourceExtra(model.getId(), result);
    } catch (Exception e) {
      LOGGER.error("Error saving model", e);
      throw new ActivitiException("Error saving model", e);
    }
  }
}
